Could you please help me.
When water is electrolyzed, two gases ar produced. As indicated in the chemical equation, twice the volume of one gas is produced compared to the other.
a) Which gas is produced in larger quantities? Explain
* I think it's hydrogen, but i am not sure why we need more hydrogen.
b)How could you test the gases to confirm your choice?
Thanks in advance.
Sure, I'd be happy to help!
a) When water is electrolyzed, two gases are produced: hydrogen gas (H2) and oxygen gas (O2). The chemical equation for this process is:
2H2O(l) -> 2H2(g) + O2(g)
According to the equation, twice the volume of hydrogen gas is produced compared to oxygen gas. This is because water consists of two hydrogen atoms and one oxygen atom. During electrolysis, each water molecule splits into two hydrogen atoms and one oxygen atom. As a result, twice the number of hydrogen atoms are produced compared to oxygen atoms, leading to twice the volume of hydrogen gas.
So, the gas produced in larger quantities is indeed hydrogen gas.
b) To test the gases and confirm your choice, there are a few methods you can use:
1. Ignition Test: Hydrogen gas is highly flammable. You can collect a sample of one of the gases and carefully ignite it using a flame. If the gas produces a pop sound or a small explosion upon ignition, it is likely to be hydrogen gas.
2. Oxygen Combustion Test: Oxygen is required to support combustion. You can collect a sample of the other gas, and using a small glowing splint, introduce it into the sample. If the splint relights, it indicates the presence of oxygen gas.
3. Simple Water Test: If you collect a sample of one of the gases and bubble it through a container of water, the gas should dissolve. Hydrogen gas is highly soluble in water, so if the gas readily dissolves, it is likely hydrogen gas.
Remember to exercise caution and follow safety protocols while working with gases and open flames.
I hope this helps! Let me know if you have any further questions.